:root {
    --bg: #081120;
    --bg-soft: #0f172a;
    --card: rgba(15, 23, 42, 0.74);
    --card-strong: rgba(15, 23, 42, 0.92);
    --border: rgba(148, 163, 184, 0.18);
    --text: #e5eefc;
    --muted: #9fb0cb;
    --primary: #4f8cff;
    --primary-strong: #3273f5;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --shadow: 0 24px 80px rgba(2, 6, 23, 0.55);
    --radius: 24px;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(79, 140, 255, 0.18), transparent 28%),
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.12), transparent 25%),
        linear-gradient(180deg, #07101d 0%, #0b1220 55%, #081120 100%);
}

button, input, select { font: inherit; }
button {
    border: 0;
    border-radius: 16px;
    padding: 12px 16px;
    cursor: pointer;
    transition: transform .18s ease, opacity .18s ease, background .18s ease, box-shadow .18s ease;
}
button:hover:enabled { transform: translateY(-1px); }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select {
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(8, 17, 32, 0.72);
    color: var(--text);
    border-radius: 14px;
    padding: 12px 14px;
}
label span {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: .92rem;
}

.app-shell {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 24px;
    padding: 24px;
    min-height: 100vh;
}

.glass-card {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.72));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.sidebar {
    padding: 22px;
    position: sticky;
    top: 24px;
    height: calc(100vh - 48px);
    overflow: auto;
}
.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}
.brand-badge {
    width: 54px;
    height: 54px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    font-weight: 800;
    letter-spacing: .03em;
    background: linear-gradient(135deg, #4f8cff, #22c55e);
    color: white;
}
.brand h1,
.hero h2,
.panel h2,
.video-card h3,
.panel h3 { margin: 0; }
.eyebrow {
    margin: 0 0 6px;
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: .74rem;
    color: #8fb2ff;
}
.muted { color: var(--muted); }
.small { font-size: .9rem; }

.panel {
    padding: 18px;
    margin-top: 16px;
}
.form-grid,
.button-grid,
.quality-box {
    display: grid;
    gap: 14px;
}
.inline-field {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}
.button-row,
.wrap-row {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}
.wrap-row { flex-wrap: wrap; }
.button-grid { grid-template-columns: 1fr 1fr; margin-top: 12px; }
.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-strong));
    color: white;
    box-shadow: 0 12px 28px rgba(50, 115, 245, 0.34);
}
.secondary-btn {
    background: rgba(148, 163, 184, 0.12);
    color: var(--text);
}
.danger-btn {
    background: rgba(239, 68, 68, 0.16);
    color: #fecaca;
}
.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.checkbox-row input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}
.status-panel {
    display: grid;
    gap: 12px;
}
.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(8, 17, 32, 0.55);
}

.main-content {
    display: grid;
    gap: 24px;
    align-content: start;
}
.hero {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
}
.hero h2 {
    font-size: clamp(1.5rem, 2vw, 2.3rem);
    max-width: 800px;
}
.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-end;
}
.hero-badges span,
.pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 8px 12px;
    background: rgba(79, 140, 255, 0.15);
    color: #d9e7ff;
    font-size: .88rem;
}
.muted-pill { background: rgba(148, 163, 184, 0.14); color: #cbd5e1; }

.video-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(320px, 1fr);
    gap: 24px;
}
.video-card { padding: 18px; }
.card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
}
.video-wrap {
    position: relative;
    border-radius: 22px;
    overflow: hidden;
    background: #030712;
    border: 1px solid rgba(148, 163, 184, 0.14);
}
.main-video-wrap { min-height: 480px; }
.small-video-wrap { min-height: 260px; }
video {
    width: 100%;
    height: 100%;
    display: block;
    background: #020617;
    object-fit: contain;
}
.video-placeholder {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 24px;
    color: var(--muted);
    background: linear-gradient(180deg, rgba(2, 6, 23, 0.38), rgba(2, 6, 23, 0.72));
}
.video-placeholder.compact { font-size: .95rem; }
.placeholder-icon { font-size: 2.8rem; margin-bottom: 10px; }

.dashboard-grid {
    display: grid;
    grid-template-columns: minmax(320px, 1.1fr) minmax(320px, .9fr);
    gap: 24px;
}
.participants-list {
    display: grid;
    gap: 12px;
}
.participant-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    align-items: center;
    padding: 14px;
    border-radius: 18px;
    background: rgba(8, 17, 32, 0.58);
    border: 1px solid rgba(148, 163, 184, 0.1);
}
.participant-name-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.participant-meta {
    margin-top: 6px;
    color: var(--muted);
    font-size: .92rem;
}
.participant-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}
.log-box {
    display: grid;
    gap: 8px;
    max-height: 340px;
    overflow: auto;
}
.log-entry {
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(8, 17, 32, 0.56);
    color: #d3deef;
    border: 1px solid rgba(148, 163, 184, 0.08);
    font-size: .94rem;
}
.empty-state {
    min-height: 120px;
    display: grid;
    place-items: center;
    color: var(--muted);
    background: rgba(8, 17, 32, 0.4);
    border-radius: 18px;
}

@media (max-width: 1200px) {
    .app-shell,
    .video-layout,
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
        height: auto;
    }
}

@media (max-width: 720px) {
    .app-shell { padding: 14px; gap: 16px; }
    .hero { padding: 18px; }
    .button-grid { grid-template-columns: 1fr; }
    .button-row { flex-direction: column; }
    .main-video-wrap { min-height: 300px; }
    .small-video-wrap { min-height: 200px; }
}